How do I remove old silicone sealant from a ceramic shower tray?
1. Pull as much of the old sealant off as you can. 2. Use silicone sealant remover available from good DIY shops and B & Q. Messy but it gets it off. 3. When all the silicone is off using a spray bottle, spray diluted (50:50) bleach and water – leave for about an hour then wash off with water. 4. Fix the quadrants with Bathroom sealant, this contains a fungicide and should stop the mould from re-appearing. Use a flexible sealant as the shower tray will move when in use. 5. After using the shower wipe away any water to help stop the mould from reappearing. Cleaning with a beach based cleaner will also help.